1. Seasonal Dimensions to Poverty;Chambers,1981
2. Paying for Health Services in Developing Countries;De Ferranti;World Bank Staff Working Papers No. 721,1985
3. The Willingness to Pay for Medical Care;Gertler,1990
4. A model of the demand for medical and health services in peninsular Malaysia;Heller;Soc. Sci. Med.,1982
5. The economic costs of illness for rural households in Burkina Faso;Sauerborn;Trop. Med. Parasitol.,1995